Vessel cross-sectional diameter is an important feature for analyzing retinal vascular changes. In automated retinal image analysis, the measurement of vascular width is a complex process as most of the vessels are few pixels wide or suffering from lack of contrast. In this paper, we propose a new method to measure the retinal blood vessel diameter which can be used to detect arteriolar narrowi...

many genetic disorders or possible abnormalities that may occur in the future generations can be predicted through analyzing the features of the chromosomes. for this purpose, karyotype is often used which to make it, there is necessary to identify each one of the 24 chromosomes from the microscopic images. the first step of this process is to define the morphological and band pattern based fea...

Automatically extracting linear structures from images is a fundamental low-level vision problem with numerous applications in different domains. Centerline detection and radial estimation are the first crucial steps in most Computer Vision pipelines aiming to reconstruct linear structures. Existing techniques rely either on hand-crafted filters, designed to respond to ideal profiles of the lin...

en Un u is em olm re travel Reiber autho Correct characterization of coronary bifurcations by optical coherence tomography (OCT) is essential for evaluation of lesions and treatment. Assessment is limited by the need for acquiring images in both the main branch (MB) and the side branch (SB) and the risk of OCT cross sections not being perpendicular to the true vessel centerline due to imaging w...

In this paper we present a novel method for the 3D centerline extraction of elongated objects such as vessels. This method unites the basic ideas in distance transformbased, thinning, and path planning methods to extract thin and connected centerlines. This fast approach needs no user interaction or any prior knowledge of the object shape. Centerline extraction is the first and most important s...

We study three-dimensional deformations of thin inextensible elastic rods with nonvanishing spontaneous curvature and torsion. In addition to the usual description in terms of curvature and torsion which considers only the configuration of the centerline of the rod, we allow deformations that involve the rotation of the rod’s cross-section around its centerline. We derive new expressions for th...

Elastic rods are curve-like elastic bodies that have one dimension (length) much larger than the others (cross-section). Their elastic energy breaks down into three contributions: stretching, bending, and twisting. Stretching and bending are captured by the deformation of a space curve called the centerline, while twisting is captured by the rotation of a material frame associated to each point...

The statistics of extreme values (SEV) and the generalized Pareto distribution (GPD) are introduced to obtain predicted maximum carbon content represent macrosegregation degree along casting direction in continuous billets (represented by 82B cord steel). Subsequently, influence mechanism superheat on has been investigated. It’s found that SEV GPD methods can correctly results obtained method i...

The size and length effects of an inclusion on multi-pass copper shaped-wire drawing were investigated. For this purpose, an experimental investigation on optimal die half-angle was conducted. Based on experimental data of optimal die half-angle, wire and inclusion deformations, drawing and hydrostatic stress of copper shaped-wires that contain an inclusion were calculated by two-dimensional fi...